Could mean the video cable is not securely connected at either end. You might check to make sure it's not lose and fully connected.
Could you post a screenshot
demonstrating how the font and sizes are off to see if it may reveal what the issue may be with this part?
Here's an image to help ID what type of cable and connection you have. If possible, using HDMI or DVI would give you the best image quality.
(click on image to enlarge)